Atomic Structure

For a given element, the atomic number indicates the number of _______

• Protons in the nucleus

• Neutrons in the nucleus

• Electrons in the nucleus

• Electrons that orbit the nucleus

For a neutral atom, the number of electrons ________

• Equals the number of neutrons

• Equals the atomic mass

• Equals the number of protons

• Equals the periodic group number

Atoms are made of which subatomic particles?

• Protons

• Electrons

• Photon

• Neutrons

Relative to protons and neutron, the mass of an electron is:

• 0

• 1

• 2

• 3

The relative atomic mass of bromine is:

• 45

• 35

• 79.904

• 5

Calculate the number of neutrons in nitrogen-15 given it has 7 protons

Calculate the atomic mass of this aluminium atom

• 13

• 14

• 27

• 1

This is the isotopic notation for copper. What is copper's atomic number?

An atom's identity or type is defined by:

• The number of electrons

• The number of neutrons

• The atomic mass

• The number of protons

The subatomic particle with a positive charge is a(n):

• Electron

• Neutron

• Proton

• Photon